Someone made a fake Facebook account of me?

[♥sophie♥]

Someone apparently made a fake Facebook account of me and has now been posting bad things about my friends, and writing statues about people I don't like, and now apparently the police are involved because everyone is saying I'm in the wrong ( I'm 14 at high school, idont have a Facebook by the way) This boy who I thought wohld stick up for me is sticking up for the girl who some people believes has made the account, and the account posted stuff about her as well.
The boy called me an evil bitch, he hopes I get expelled from my school and taken to the police.
I'm scared because theres two of them against me, my school is trying to find out who it is but I know something will go wrong and something will happen and ill get into so much trouble.
I spent my whole french lesson crying because of what that boy said, he was supposed to be my friend as well. Me and my friend's confronted him and asked him but he wouldn't look at me and he looked so guilty so I believe it's him.
I'm just so sick of people picking on me, I just got over some long term depression and I know if everything keeps piling on top of me and people keep saying stuff it's going to come back and it's not what I want.
I need help on what ican do to help solve the problem? Some advice please I really could do with it. Thank you x